| 摘要 |
PURPOSE:To reduce the memory area to be used and the program quantity by inverting only a bit shown by coincidence data among internal data in an internal data storage part. CONSTITUTION:This method is provided with a present data storage part (accumulator) Acc, an internal data storage part (memory) M2, a bit variation detecting part EOR1, a variation data storage part (memory) M1, an internal data updating part EOR2, a coincidence detecting part AND. In such a state, internal data required for the control is stored in the internal data storage part M2, and by comparing the input data inputted repeatedly from the outside with the internal data, variation data for showing a varied bit is generated, and this variation data is stored in the variation data storage part M1. Subsequently, by comparing the present variation data with the variation data of the previous time in the variation data storage part M1, coincidence data for showing the bit varied continuously is generated, and only the bit shown by the coincidence data among the internal data in the internal data storage part M2 is inverted. In such a manner, the memory area to be used and the number of steps can be reduced. |
